Computer-assisted holographic method and device
CA 2311567 A1 · Owner: European Community · Inventors: Noirard, Pierre; Grossetie, Jean-Claude
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a method which consists in computing (E1-E4) in a , three-dimensional geometric space a set of two-dimensional images , representing a virtual object from different respective viewpoints. The virtual object is represented by digital data stored in a computer. The holograms are computed (E5-E6) for the two-dimensional images respectively by a complex transform, such as a Fourier transform technique. The holograms are then juxtaposed (E7) to form a digital hologram of the object which is , physically reproduced (E8) by a light spatial modulator. By illuminating the light spatial modulator with a coherent source a three-dimensional image of , the object is obtained.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed November 17, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 17, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 17, 2020.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.